Abstract

General models of aerosol dynamics, originally developed to
simulate atmospheric aerosol behavior, have been extended for
application to combustion and other high temperature processes.
These models are now being used to study the fate of ash vapors
in conventional pulverized-coal combustion. Field measurements
have shown that the vapors condense preferentially on the surfaces
of the smaller ash particles. Previous simplified calculations have
suggested that large numbers of very small particles may also be
formed by the condensation of these vapors. The new, exact calculations
will be used to explore the relative importance of new particle
formation and condensation on existing particles, the size distributions
of the particles produced under various combustion conditions,
and the distribution of chemical composition with respect to particle
size.